Medium
Security advisory
A flaw was found in ImageMagick in coders/webp.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-20245
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:47 UTC · Revision 1
Source evidence
A flaw was found in ImageMagick in coders/webp.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability.
osv:CVE-2021-20245
Complete source record
{
"id": "6b7074e8b1562c4771b67c9854acbef56aed06c34bfa05af756f00605f655061",
"url": "https://osv.dev/vulnerability/CVE-2021-20245",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-20245",
"summary": "A flaw was found in ImageMagick in coders/webp.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability.",
"evidence": "osv:CVE-2021-20245",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-20245",
"aliases": [
"CVE-2021-20245"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/imagemagick/imagemagick",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "35b4991eb0939a327f3489988c366e21068b0178"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.10-62"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"7.0.10-61",
"7.0.10-60",
"7.0.10-59",
"7.0.10-58",
"7.0.10-57",
"7.0.10-56",
"7.0.10-55",
"7.0.10-54",
"7.0.10-53",
"7.0.10-52",
"7.0.10-51",
"7.0.10-50",
"7.0.10-49",
"7.0.10-48",
"7.0.10-47",
"7.0.10-46",
"7.0.10-45",
"7.0.10-44",
"7.0.10-43",
"7.0.10-42",
"7.0.10-41",
"7.0.10-40",
"7.0.10-39",
"7.0.10-38",
"7.0.10-37",
"7.0.10-36",
"7.0.10-35",
"7.0.10-34",
"7.0.10-33",
"7.0.10-32",
"7.0.10-31",
"7.0.10-30",
"7.0.10-29",
"7.0.10-28",
"7.0.10-27",
"7.0.10-26",
"7.0.10-25",
"7.0.10-24",
"7.0.10-23",
"7.0.10-22",
"7.0.10-21",
"7.0.10-20",
"7.0.10-19",
"7.0.10-18",
"7.0.10-17",
"7.0.10-16",
"7.0.10-15",
"7.0.10-14",
"7.0.10-13",
"7.0.10-12",
"7.0.10-11",
"7.0.10-10",
"7.0.10-9",
"7.0.10-8",
"7.0.10-7",
"7.0.10-6",
"7.0.10-5",
"7.0.10-4",
"7.0.10-3",
"7.0.10-2",
"7.0.10-1",
"7.0.10-0",
"7.0.9-27",
"7.0.9-26",
"7.0.9-25",
"7.0.9-24",
"7.0.9-23",
"7.0.9-22",
"7.0.9-21",
"7.0.9-20",
"7.0.9-19",
"7.0.9-18",
"7.0.9-17",
"7.0.9-16",
"7.0.9-15",
"7.0.9-14",
"7.0.9-13",
"7.0.9-12",
"7.0.9-11",
"7.0.9-10",
"7.0.9-9",
"7.0.9-8",
"7.0.9-7",
"7.0.9-6",
"7.0.9-5",
"7.0.9-4",
"7.0.9-2",
"7.0.9-1",
"7.0.9-0",
"7.0.8-68",
"7.0.8-67",
"7.0.8-66",
"7.0.8-65",
"7.0.8-64",
"7.0.8-63",
"7.0.8-62",
"7.0.8-61",
"7.0.8-60",
"7.0.8-59",
"7.0.8-58",
"7.0.8-57",
"7.0.8-56",
"7.0.8-55",
"7.0.8-54",
"7.0.8-53",
"7.0.8-52",
"7.0.8-51",
"7.0.8-50",
"7.0.8-49",
"7.0.8-48",
"7.0.8-47",
"7.0.8-46",
"7.0.8-45",
"7.0.8-44",
"7.0.8-43",
"7.0.8-42",
"7.0.8-41",
"7.0.8-40",
"7.0.8-39",
"7.0.8-38",
"7.0.8-37",
"7.0.8-36",
"7.0.8-35",
"7.0.8-34",
"7.0.8-33",
"7.0.8-32",
"7.0.8-31",
"7.0.8-30",
"7.0.8-29",
"7.0.8-28",
"7.0.8-27",
"7.0.8-26",
"7.0.8-25",
"7.0.8-24",
"7.0.8-23",
"7.0.8-22",
"7.0.8-21",
"7.0.8-20",
"7.0.8-19",
"7.0.8-18",
"7.0.8-17",
"7.0.8-16",
"7.0.8-15",
"7.0.8-14",
"7.0.8-13",
"7.0.8-12",
"7.0.8-11",
"7.0.8-10",
"7.0.8-9",
"7.0.8-8",
"7.0.8-7",
"7.0.8-6",
"7.0.8-5",
"7.0.8-4",
"7.0.8-3",
"7.0.8-2",
"7.0.8-1",
"7.0.8-0",
"7.0.7-39",
"7.0.7-38",
"7.0.7-37",
"7.0.7-36",
"7.0.7-35",
"7.0.7-34",
"7.0.7-33",
"7.0.7-32",
"7.0.7-31",
"7.0.7-30",
"7.0.7-29",
"7.0.7-28",
"7.0.7-27",
"7.0.7-26",
"7.0.7-25",
"7.0.7-24",
"7.0.7-23",
"7.0.7-22",
"7.0.7-21",
"7.0.7-20",
"7.0.7-19",
"7.0.7-18",
"7.0.7-17",
"7.0.7-16",
"7.0.7-15",
"7.0.7-14",
"7.0.7-13",
"7.0.7-12",
"7.0.7-11",
"7.0.7-10",
"7.0.7-9",
"7.0.7-8",
"7.0.7.7",
"7.0.7-6",
"7.0.7-5",
"7.0.7-4",
"7.0.7-3",
"7.0.7-2",
"7.0.7-1",
"7.0.7-0",
"7.0.6-9",
"7.0.6-8",
"7.0.6-7",
"7.0.6-6",
"7.0.6-5",
"7.0.6-4",
"7.0.6-3",
"7.0.6-2",
"7.0.6-1",
"7.0.6-0",
"7.0.5-10",
"7.0.5-9",
"7.0.5-8",
"7.0.5-7",
"7.0.5-6",
"7.0.5-5",
"7.0.5-4",
"7.0.5-3",
"7.0.5-2",
"7.0.5-1",
"7.0.5-0",
"7.0.4-10",
"7.0.4-9",
"7.0.4-8",
"7.0.4-7",
"7.0.4-6",
"7.0.4-5",
"7.0.4-4",
"7.0.4-3",
"7.0.4-2",
"7.0.4-1",
"7.0.4-0",
"7.0.3-10",
"7.0.3-9",
"7.0.3-8",
"7.0.3-7",
"7.0.3-6",
"7.0.3-5",
"7.0.3-4",
"7.0.3-3",
"7.0.3-2",
"7.0.3-1",
"7.0.3-0",
"7.0.2-10",
"7.0.2-9",
"7.0.2-8",
"7.0.2-7",
"7.0.2-6",
"7.0.2-5",
"7.0.2-4",
"7.0.2-3",
"7.0.2-2",
"7.0.2-1",
"7.0.2-0",
"7.0.1-10",
"7.0.1-9",
"7.0.1-8",
"7.0.1-7",
"7.0.1-6",
"7.0.1-5",
"7.0.1-4",
"7.0.1-3",
"7.0.1-2",
"7.0.1-1",
"7.0.1-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20245.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/imagemagick/imagemagick6",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "9a63144fce57cca48b3154c854e7f8477f7a01aa"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "6.9.11-62"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"6.9.11-61",
"6.9.11-60",
"6.9.11-59",
"6.9.11-57",
"6.9.11-56",
"6.9.11-55",
"6.9.11-54",
"6.9.11-53",
"6.9.11-52",
"6.9.11-51",
"6.9.11-50",
"6.9.11-49",
"6.9.11-48",
"6.9.11-47",
"6.9.11-46",
"6.9.11-45",
"6.9.11-44",
"6.9.11-43",
"6.9.11-42",
"6.9.11-41",
"6.9.11-40",
"6.9.11-39",
"6.9.11-38",
"6.9.11-37",
"6.9.11-36",
"6.9.11-35",
"6.9.11-34",
"6.9.11-33",
"6.9.11-32",
"6.9.11-31",
"6.9.11-30",
"6.9.11-29",
"6.9.11-28",
"6.9.11-27",
"6.9.11-26",
"6.9.11-25",
"6.9.11-24",
"6.9.11-23",
"6.9.11-22",
"6.9.11-21",
"6.9.11-20",
"6.9.11-19",
"6.9.11-18",
"6.9.11-17",
"6.9.11-16",
"6.9.11-15",
"6.9.11-14",
"6.9.11-13",
"6.9.11-12",
"6.9.11-11",
"6.9.11-10",
"6.9.11-9",
"6.9.11-8",
"6.9.11-7",
"6.9.11-6",
"6.9.11-5",
"6.9.11-4",
"6.9.11-3",
"6.9.11-2",
"6.9.11-1",
"6.9.11-0",
"6.9.10-97",
"6.9.10-96",
"6.9.10-95",
"6.9.10-94",
"6.9.10-93",
"6.9.10-92",
"6.9.10-91",
"6.9.10-90",
"6.9.10-89",
"6.9.10-88",
"6.9.10-87",
"6.9.10-86",
"6.9.10-85",
"6.9.10-84",
"6.9.10-83",
"6.9.10-82",
"6.9.10-81",
"6.9.10-80",
"6.9.10-79",
"6.9.10-78",
"6.9.10-77",
"6.9.10-75",
"6.9.10-74",
"6.9.10-73",
"6.9.10-72",
"6.9.10-71",
"6.9.10-70",
"6.9.10-69",
"6.9.10-68",
"6.9.10-67",
"6.9.10-66",
"6.9.10-65",
"6.9.10-64",
"6.9.10-63",
"6.9.10-62",
"6.9.10-61",
"6.9.10-60",
"6.9.10-59",
"6.9.10-58",
"6.9.10-57",
"6.9.10-56",
"6.9.10-55",
"6.9.10-54",
"6.9.10-53",
"6.9.10-52",
"6.9.10-51",
"6.9.10-50",
"6.9.10-49",
"6.9.10-48",
"6.9.10-47",
"6.9.10-46",
"6.9.10-45",
"6.9.10-44",
"6.9.10-43",
"6.9.10-42",
"6.9.10-41",
"6.9.10-40",
"6.9.10-39",
"6.9.10-38",
"6.9.10-37",
"6.9.10-36",
"6.9.10-35",
"6.9.10-34",
"6.9.10-33",
"6.9.10-32",
"6.9.10-31",
"6.9.10-30",
"6.9.10-29",
"6.9.10-28",
"6.9.10-27",
"6.9.10-26",
"6.9.10-25",
"6.9.10-24",
"6.9.10-23",
"6.9.10-22",
"6.9.10-21",
"6.9.10-20",
"6.9.10-19",
"6.9.10-18",
"6.9.10-17",
"6.9.10-16",
"6.9.10-15",
"6.9.10-14",
"6.9.10-13",
"6.9.10-12",
"6.9.10-11",
"6.9.10-10",
"6.9.10-9",
"6.9.10-8",
"6.9.10-7",
"6.9.10-6",
"6.9.10-5",
"6.9.10-4",
"6.9.10-3",
"6.9.10-2",
"6.9.10-1",
"6.9.10-0",
"6.9.9-51",
"6.9.9-50",
"6.9.9-49",
"6.9.9-48",
"6.9.9-47",
"6.9.9-46",
"6.9.9-45",
"6.9.9-44",
"6.9.9-43",
"6.9.9-42",
"6.9.9-41",
"6.9.9-40",
"6.9.9-39",
"6.9.9-38",
"6.9.9-37",
"6.9.9-36",
"6.9.9-35",
"6.9.9-34",
"6.9.9-33",
"6.9.9-32",
"6.9.9-31",
"6.9.9-30",
"6.9.9-29",
"6.9.9-28",
"6.9.9-27",
"6.9.9-26",
"6.9.9-25",
"6.9.9-24",
"6.9.9-23",
"6.9.9-22",
"6.9.9-21",
"6.9.9-20",
"6.9.9-19",
"6.9.9-18",
"6.9.9-17",
"6.9.9-15",
"6.9.9-14",
"6.9.9-13",
"6.9.9-12",
"6.9.9-11",
"6.9.9-10",
"6.9.9-9",
"6.9.9-8",
"6.9.9-7",
"6.9.9-6",
"6.9.9-5",
"6.9.9-4",
"6.9.9-3",
"6.9.9-2",
"6.9.9-1",
"6.9.9-0",
"6.9.8-10",
"6.9.8-9",
"6.9.8-8",
"6.9.8-7",
"6.9.8-6",
"6.9.8-5",
"6.9.8-4",
"6.9.8-3",
"6.9.8-2",
"6.9.8-1",
"6.9.8-0",
"6.9.7-10",
"6.9.7-9",
"6.9.7-8",
"6.9.7-7",
"6.9.7-6",
"6.9.7-5",
"6.9.7-4",
"6.9.7-3",
"6.9.7-2",
"6.9.7-1",
"6.9.7-0",
"6.9.6-8",
"6.9.6-7",
"6.9.6-6",
"6.9.6-5",
"6.9.6-4",
"6.9.6-3",
"6.9.6-2",
"6.9.6-1",
"6.9.6-0",
"6.9.5-10",
"6.9.5-9",
"6.9.5-8",
"6.9.5-7",
"6.9.5-6",
"6.9.5-5",
"6.9.5-4",
"6.9.5-3",
"6.9.5-2",
"6.9.5-1",
"6.9.5-0",
"6.9.4-10",
"6.9.4-9",
"6.9.4-8",
"6.9.4-7",
"6.9.4-6",
"6.9.4-5",
"6.9.4-4",
"6.9.4-3",
"6.9.4-2",
"6.9.4-1",
"6.9.4-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20245.json"
}
}
],
"modified": "2026-10-24T10:50:11.103436910Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html",
"https://lists.debian.org/debian-lts-announce/2021/06/msg00000.html",
"https://bugzilla.redhat.com/show_bug.cgi?id=1928943",
"https://github.com/ImageMagick/ImageMagick/issues/3176"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*"
],
"vendor_product": "imagemagick:imagemagick",
"extracted_events": [
{
"range": [
{
"fixed": "6.9.11-62"
},
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.10-62"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "33"
},
{
"last_affected": "33"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
},
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-20245",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 442032,
"published_at": "2021-03-09T19:15:12.5+00:00"
}